Map construction system and map construction method

A map construction system, configured on a mobile vehicle, wherein the mobile vehicle moves in a real world, the map construction system comprising:

• a positioning system, configured to periodically detect a base world coordinate corresponding to the mobile vehicle;
• an image capturing device, configured to periodically capture a first image of surroundings outside the mobile vehicle;
• a LiDAR, configured to periodically obtain LiDAR data of the surroundings outside the mobile vehicle;
• and
• a processor, electrically connected to the positioning system, the image capturing device, and the LiDAR,
• wherein the processor is configured to identify a plurality of target objects in the first image, and project a plurality of LiDAR data points onto the first image to obtain a second image according to the LiDAR data,
• wherein the processor is further configured to select one target object from the one or more target objects which have not been selected,
• wherein the processor is further configured to identify a plurality of projected target LiDAR data points in the selected target object as a plurality of target object base points of the selected target object, and identify an image coordinate of each of the target object base points,
• wherein the processor is further configured to obtain a plurality of object world coordinates respectively corresponding to the target object base points according to the respective image coordinates of the target object base points, LiDAR information, and the base world coordinate,
• wherein the processor is further configured to dispose the corresponding selected target object into a high definition map according to the object world coordinates.